Crown protection device for wristwatch
AssigneeTissot SA
InventorAndré Saunier
Life of this patent
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Abstract
The device includes a cover for concealing or revealing a crown, via a relative rotation of the crown and an external casing element. In a preferred embodiment, the cover is secured to a ring slide friction mounted in an annular groove at the base of the middle part and held in place by a washer provided with lugs in order to be screwed into the horns of the middle part.
Claims15
A crown protection device for a wristwatch including a movement including at least, at the end of a winding stem, a crown able to be concealed by a cover provided in an external casing, formed in particular by a middle part, closed on the dial side by a crystal surrounded by a bezel, by a back cover and by horns for attaching wristband strands, wherein the cover is independent of the bezel and wherein the movement and the external casing, or an element integrated in the external casing, can be manipulated in relative rotation in the plane of the watch between a position in which the crown is concealed by the cover and a position in which it is revealed.
Dependencies are inferred from the claim text.